Axial loading buffer device for high-speed bearing test bed and use method of axial loading buffer device

Abstract

The invention discloses an axial loading buffer device for a high-speed bearing test bed and a use method of the axial loading buffer device, and relates to the technical field of loading buffer devices for high-speed bearing test beds. An axial loading buffer device for a high-speed bearing test bed comprises a thrust block, an output end pressing plate, a thrust sleeve, a sleeve, a piston rod, an input end gland and a spring. The application method comprises the following steps: placing the electric cylinder at the rear end of the piston rod, and fixing a bearing test piece at the front end of the thrust block; the electric cylinder is started, the transmission rod of the electric cylinder pushes the piston rod to move forwards, and the thrust sleeve drives the thrust block to repeatedly load the bearing test piece under the elastic force action of the spring until loading is completed. The axial loading buffer device for the high-speed bearing test bed and the using method of the axial loading buffer device can be obtained.

Description

Technical Field

[0001] This invention relates to the technical field of loading buffer devices for high-speed bearing test benches, and specifically to an axial loading buffer device for high-speed bearing test benches and its usage method. Background Technology

[0002] The loading system of a high-speed aerospace bearing test bench is an integrated system consisting of an electric cylinder, a servo motor, a servo driver, and a force sensor. The electric cylinder converts the rotary motion of the servo motor into linear motion, and transforms the best advantages of the servo motor—precise speed control, precise revolution control, and precise torque control—into precise speed control, precise position control, and precise thrust control. It features low energy consumption, low product failure rate, and convenient use and maintenance.

[0003] However, the loading of the electric cylinder will have a certain impact on the test piece. Therefore, a buffer device needs to be set between the electric cylinder and the test piece to achieve smooth loading of the load. However, no similar buffer device has been reported yet. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems by providing an axial loading buffer device for a high-speed bearing test bench and its usage method.

[0005] An axial loading buffer device for a high-speed bearing test bench includes a thrust head 1, an output end pressure plate 2, a thrust sleeve 3, a sleeve 4, a piston rod 5, an input end pressure cover 6, and a spring 7.

[0006] The sleeve 4 is provided with an output end pressure plate 2 at the front end and an input end pressure cover 6 at the rear end, and both the output end pressure plate 2 and the input end pressure cover 6 are provided with through holes at their centers.

[0007] The circumferential surface of the thrust sleeve 3 is clearance-fitted with the through hole of the output end pressure plate 2; the front end of the inner diameter of the thrust sleeve 3 is provided with an internal thread, and the tail end of the thrust head 1 is provided with an external thread, and the tail end of the thrust head 1 is threadedly connected to the thrust sleeve 3.

[0008] The tail end of the piston rod 5 is clearance-fitted with the through hole of the input end cap 6; the front end of the piston rod 5 is set in the inner hole of the thrust sleeve 3; the outer surface of the thrust sleeve 3 is provided with an annular baffle a 3-1, the outer surface of the piston rod 5 is provided with an annular baffle b 5-1, and the spring 7 is sleeved between the annular baffle a 3-1 of the thrust sleeve 3 and the annular baffle b 5-1 of the piston rod 5;

[0009] The center lines of the thrust head 1, output end pressure plate 2, thrust sleeve 3, sleeve 4, piston rod 5 and input end pressure cover 6 are all on the same straight line.

[0010] A method for using an axial loading buffer device for a high-speed bearing test bench is as follows:

[0011] Place the electric cylinder at the rear end of the piston rod 5 and fix the bearing test piece at the front end of the thrust head 1; start the electric cylinder, and the transmission rod of the electric cylinder pushes the piston rod 5 forward. Under the action of the spring force of the spring 7, the thrust head 1 is driven by the thrust sleeve 3 to repeatedly load the bearing test piece until the loading is completed.

[0012] The beneficial effects of this invention are:

[0013] This invention is applied to a high-speed bearing loading system, effectively buffering the loading impact of the electric cylinder on the bearing test piece, thus ensuring a smooth load application to the test bearing. The invention has a simple structure, is easy to assemble and disassemble, and can be used as an independent loading buffer unit in a motor loading test bench. Furthermore, by changing the spring specifications, it can meet a wider range of loading force buffering requirements.

[0014] The present invention provides an axial loading buffer device for a high-speed bearing test bench and a method for using it. Attached Figure Description

[0015] Figure 1 This diagram shows the structure of an axial loading buffer device for a high-speed bearing test bench. 1 represents the thrust head, 2 represents the output end pressure plate, 3 represents the thrust sleeve, 3-1 represents the annular baffle a, 3-2 represents the vent a, 4 represents the sleeve, 4-1 represents the vent b, 5 represents the piston rod, 5-1 represents the annular baffle b, 6 represents the input end pressure cap, 7 represents the spring, and 8 represents the annular connecting piece. Detailed Implementation

[0016] Specific implementation method one: This implementation method is an axial loading buffer device for a high-speed bearing test bench, including a thrust head 1, an output end pressure plate 2, a thrust sleeve 3, a sleeve 4, a piston rod 5, an input end pressure cover 6, and a spring 7.

[0017] The sleeve 4 is provided with an output end pressure plate 2 at the front end and an input end pressure cover 6 at the rear end, and both the output end pressure plate 2 and the input end pressure cover 6 are provided with through holes at their centers.

[0018] The circumferential surface of the thrust sleeve 3 is clearance-fitted with the through hole of the output end pressure plate 2; the front end of the inner diameter of the thrust sleeve 3 is provided with an internal thread, and the tail end of the thrust head 1 is provided with an external thread, and the tail end of the thrust head 1 is threadedly connected to the thrust sleeve 3.

[0019] The tail end of the piston rod 5 is clearance-fitted with the through hole of the input end cap 6; the front end of the piston rod 5 is set in the inner hole of the thrust sleeve 3; the outer surface of the thrust sleeve 3 is provided with an annular baffle a 3-1, the outer surface of the piston rod 5 is provided with an annular baffle b 5-1, and the spring 7 is sleeved between the annular baffle a 3-1 of the thrust sleeve 3 and the annular baffle b 5-1 of the piston rod 5;

[0020] The center lines of the thrust head 1, output end pressure plate 2, thrust sleeve 3, sleeve 4, piston rod 5 and input end pressure cover 6 are all on the same straight line.

[0021] Specific Implementation Method Two: The difference between this implementation method and Specific Implementation Method One is that a bearing test piece is provided at the front end of the thrust head 1.

[0022] The other steps are the same as in Specific Implementation Method 1.

[0023] Specific Implementation Method 3: The difference between this implementation method and Specific Implementation Method 1 or 2 is that an electric cylinder is provided at the rear end of the piston rod 5.

[0024] The other steps are the same as in specific implementation method one or two.

[0025] Specific implementation method four: The difference between this implementation method and one of the specific implementation methods one to three is that the output end pressure plate 2 is fixedly connected to the front end of the sleeve 4.

[0026] The other steps are the same as those in Specific Implementation Methods One to Three.

[0027] Specific implementation method five: The difference between this implementation method and one of the specific implementation methods one to four is that the end cap 6 is connected to the rear end of the sleeve 4 by bolts.

[0028] The other steps are the same as those in Specific Implementation Methods One through Four.

[0029] Specific Implementation Method Six: The difference between this implementation method and Specific Implementation Methods One to Five is that the compression stroke of the spring 7 is less than the inner hole length of the thrust sleeve 3.

[0030] The other steps are the same as those in Specific Implementation Methods 1 to 5.

[0031] Specific Implementation Method Seven: The difference between this implementation method and Specific Implementation Methods One to Six is ​​that the thrust sleeve 3 is provided with a vent hole a 3-2 on the part outside the sleeve 4.

[0032] The other steps are the same as those in Specific Implementation Methods 1 to 6.

[0033] Specific implementation method eight: The difference between this implementation method and one of the specific implementation methods one to seven is that the sleeve 4 is provided with a vent hole b 4-1.

[0034] The other steps are the same as those in Specific Implementation Methods 1 to 7.

[0035] Specific implementation method nine: The difference between this implementation method and specific implementation methods one to eight is that: the outer surface of the sleeve 4 is provided with an annular connector 8, and the sleeve 4 is fixed to the test bench by the annular connector 8.

[0036] The other steps are the same as those in Specific Implementation Methods 1 to 8.

[0037] Specific Implementation Method Ten: This implementation method describes a method for using an axial loading buffer device for a high-speed bearing test bench, which is carried out according to the following steps:

[0038] Place the electric cylinder at the rear end of the piston rod 5 and fix the bearing test piece at the front end of the thrust head 1; start the electric cylinder, and the transmission rod of the electric cylinder pushes the piston rod 5 forward. Under the action of the spring force of the spring 7, the thrust head 1 is driven by the thrust sleeve 3 to repeatedly load the bearing test piece until the loading is completed.

[0039] The beneficial effects of the present invention are verified using the following embodiments:

[0040] Example 1: An axial loading buffer device for a high-speed bearing test bench, comprising a thrust head 1, an output end pressure plate 2, a thrust sleeve 3, a sleeve 4, a piston rod 5, an input end pressure cover 6, and a spring 7;

[0041] The output end pressure plate 2 is fixedly connected to the front end of the sleeve 4, and the end pressure cover 6 is connected to the rear end of the sleeve 4 by bolts. Both the output end pressure plate 2 and the input end pressure cover 6 have through holes in their centers.

[0042] The circumferential surface of the thrust sleeve 3 is clearance-fitted with the through hole of the output end pressure plate 2; the front end of the inner diameter of the thrust sleeve 3 is provided with an internal thread, and the tail end of the thrust head 1 is provided with an external thread, and the tail end of the thrust head 1 is threadedly connected to the thrust sleeve 3.

[0043] The tail end of the piston rod 5 is clearance-fitted with the through hole of the input end cap 6; the front end of the piston rod 5 is set in the inner hole of the thrust sleeve 3; the outer surface of the thrust sleeve 3 is provided with an annular baffle a 3-1, the outer surface of the piston rod 5 is provided with an annular baffle b 5-1, and the spring 7 is sleeved between the annular baffle a 3-1 of the thrust sleeve 3 and the annular baffle b 5-1 of the piston rod 5;

[0044] The center lines of the thrust head 1, output end pressure plate 2, thrust sleeve 3, sleeve 4, piston rod 5 and input end pressure cover 6 are all on the same straight line.

[0045] The front end of the thrust head 1 is provided with a bearing test piece.

[0046] An electric cylinder is provided at the rear end of the piston rod 5.

[0047] The compression stroke of the spring 7 is less than the inner hole length of the thrust sleeve 3, ensuring that the piston rod 5 is always inside the inner hole of the thrust sleeve 3 during operation.

[0048] The thrust sleeve 3 is provided with a vent a 3-2 on the part outside the sleeve 4, and the sleeve 4 is provided with a vent b 4-1, both of which are used to balance the internal and external pressures.

[0049] The outer surface of the sleeve 4 is provided with an annular connector 8, and the sleeve 4 is fixed to the test bench by the annular connector 8.

[0050] This embodiment consists of 3 thrust actuation components: a thrust head 1, a thrust sleeve 3, and a piston rod 5; 3 positioning components: an output end pressure plate 2, a sleeve 4, and an input end pressure cover 6; and a buffer spring 7. The thrust head 1, the thrust sleeve 3, and the piston rod 5 are on the same axis and are coaxially arranged with the output end pressure plate 2, the sleeve 4, and the input end pressure cover 6.

[0051] The specifications of the buffer spring 7 are selected based on the required loading force. By replacing spring elements of different specifications, the requirements of different loading force ranges can be met.

[0052] A method for using an axial loading buffer device for a high-speed bearing test bench involves placing an electric cylinder at the rear end of a piston rod 5 and fixing the bearing test piece at the front end of a thrust head 1. The electric cylinder is activated, and its transmission rod pushes the piston rod 5 forward. Under the elastic force of a spring 7, the thrust head 1 is driven by a thrust sleeve 3 to repeatedly load the bearing test piece until the loading is complete.

[0053] The working principle described above is as follows:

[0054] The piston rod 5 and the thrust sleeve 3 serve as guiding units, and the spring 7 serves as a buffer unit. When the transmission rod of the electric cylinder acts on the piston rod 5, the spring 7 is compressed and pushes the thrust sleeve 3 and the thrust head 1 forward to the bearing load loading point. The spring 7 acts as a buffer unit to absorb the instantaneous impact and transmit the loading force to the bearing test piece.

Claims

1. An axial loading buffer device for a high-speed bearing test bench, characterized in that, The axial loading buffer device for a high-speed bearing test bench includes a thrust head (1), an output end pressure plate (2), a thrust sleeve (3), a sleeve (4), a piston rod (5), an input end pressure cap (6), and a spring (7). The sleeve (4) is provided with an output end pressure plate (2) at the front end and an input end pressure cover (6) at the rear end. Both the output end pressure plate (2) and the input end pressure cover (6) are provided with through holes at their centers. The circumferential surface of the thrust sleeve (3) is clearance-fitted with the through hole of the output end pressure plate (2); the inner diameter front end of the thrust sleeve (3) is provided with an internal thread, the tail end of the thrust head (1) is provided with an external thread, and the tail end of the thrust head (1) is threadedly connected to the thrust sleeve (3). The tail end of the piston rod (5) is clearance-fitted with the through hole of the input end cap (6); the front end of the piston rod (5) is set in the inner hole of the thrust sleeve (3); the outer surface of the thrust sleeve (3) is provided with an annular baffle a (3-1), the outer surface of the piston rod (5) is provided with an annular baffle b (5-1), and the spring (7) is sleeved between the annular baffle a (3-1) of the thrust sleeve (3) and the annular baffle b (5-1) of the piston rod (5); The center lines of the thrust head (1), output end pressure plate (2), thrust sleeve (3), sleeve (4), piston rod (5) and input end pressure cover (6) are all on the same straight line.

2. The axial loading buffer device for a high-speed bearing test bench according to claim 1, characterized in that, The front end of the thrust head (1) is provided with a bearing test piece.

3. The axial loading buffer device for a high-speed bearing test bench according to claim 1, characterized in that, An electric cylinder is provided at the rear end of the piston rod (5).

4. An axial loading buffer device for a high-speed bearing test bench according to claim 1, characterized in that, The output end pressure plate (2) is fixedly connected to the front end of the sleeve (4).

5. An axial loading buffer device for a high-speed bearing test bench according to claim 1, characterized in that, The end cap (6) is connected to the rear end of the sleeve (4) by bolts.

6. An axial loading buffer device for a high-speed bearing test bench according to claim 1, characterized in that, The compression stroke of the spring (7) is less than the inner hole length of the thrust sleeve (3).

7. An axial loading buffer device for a high-speed bearing test bench according to claim 1, characterized in that, The thrust sleeve (3) is provided with a vent hole a (3-2) on the part outside the sleeve (4).

8. An axial loading buffer device for a high-speed bearing test bench according to claim 1, characterized in that, The sleeve (4) is provided with a vent hole b (4-1).

9. An axial loading buffer device for a high-speed bearing test bench according to claim 1, characterized in that, The outer surface of the sleeve (4) is provided with an annular connector (8), and the sleeve (4) is fixed on the test bench by the annular connector (8).

10. A method of using the axial loading buffer device for a high-speed bearing test bench as described in any one of claims 1-9, characterized in that, The usage method is as follows: Place the electric cylinder at the rear end of the piston rod (5) and fix the bearing test piece at the front end of the thrust head (1); start the electric cylinder, and the transmission rod of the electric cylinder pushes the piston rod (5) forward. Under the elastic force of the spring (7), the thrust head (1) is driven by the thrust sleeve (3) to repeatedly load the bearing test piece until the loading is completed.

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